Keyboard



FIG. 1 is a front perspective view of a keyboard;

FIG. 2 is a back perspective view of the keyboard;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a back elevational view thereof;

FIG. 5 is a left elevational view thereof;

FIG. 6 is a right elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown in the drawings of the keyboard are forillustrating portions of the article and form no part of the claimeddesign.

We claim the ornamental design for a keyboard, as shown and described.